(new edit) in the strictest sense this may have been true once. however, in common usage today any front engined, rear drive, convertible, with an emphasis on handling rather than horsepower would be considered a roadster. For example the Mazda MX-5 Miata is the quintessential modern roadster.
the term roadster was also applied to racing cars in 1950's America where the engine and drive shaft were offset from the centerline of the car allowing the driver to sit lower in the car which improved handling on the oval tracks of the day. the practice was eventually discontinued when rear engined race cars became dominant.
so, the term "roadster" for all practical purposes has been applied to so many different types of cars over the years it has lost much of its meaning. if you ask 5 different gear heads you will probably get 5 different "right" answers.
The 2013 Mini Cooper-Roadster is a gas-powered vehicle.
The 2012 Mini Cooper-Roadster is a gas-powered vehicle.
The 2014 Mini Cooper-Roadster is a gas-powered vehicle.
The gross weight of the 2013 Mini Cooper-Roadster is 3241 lbs..
The gross weight of the 2012 Mini Cooper-Roadster is 3241 lbs..
The gross weight of the 2014 Mini Cooper-Roadster is 3241 lbs..
Tesla Roadster Electronic Vehicle
The word 'roadster' is a singular, common, concrete noun; a word for a type of vehicle, a thing. A noun is used as the subject of a sentence or clause, and as the object of a verb or preposition. A sentence to use the work roadster in is: " The 2003 roadster version is available in manual or automatic transmissions."
A BRP Can AM Spyder Roadster is a special type of vehicle that has two wheels in the front and just one in the back. It is good for open-air riding and is very unique.
Singer Roadster was created in 1939.
Tesla Roadster was created in 2007.
Roadster diner was created in 1998.